Effects of simulated clinical fabrication heat treatment and artificial weathering on the tensile testing of prosthetics/orthotics polymers

Waldmeier, Michael D.; Greener, E.H.; Lautenschlager, Eugene P.; Nowak, Michael D.

doi:10.1002/(sici)1097-4628(19960627)60:13<2489::aid-app19>3.0.co;2-#

Cited by 4 publications

(2 citation statements)

References 11 publications

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“…For good clamping, the ends of the fiber specimens were glued to cardboard frames with epoxy resin [10]. The tensile modulus was determined from the initial linear slope of the stress-strain curve [ 16].…”

Section: Measurement Of Physical Propertiesmentioning

confidence: 99%

Physical Properties of Lyocell Fibers Spun from Isotropic Cellulose Dope in NMMO Monohydrate

Chae

Kim

et al. 2002

Textile Research Journal

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This article describes the physical properties of lyocell fibers spun from an isotropic cellulose spinning dope in N-methyl morpholine N-oxide (NMMO) monohydrate (IPS lyocell fibers). Wide angle x-ray diffraction (wAxD) experiments on the crimped fibers exhibit little difference in the crystal structure of IPS and Tencel lyocell fibers: both fibers reveal a cellulose II structure. However, the IPS lyocell fibers have a lower tensile modulus than Tencel by about 12.5%, although they have a similar tensile strength. Wetting and subsequent drying shift the loss tangent values higher, which is more remarkable for the IPS lyocell fibers dried under tension. Further, the IPS lyocell fibers dried under tension have a sharper α-transition peak than the fibers dried without tension. The IPS lyocell fibers exhibit excellent wet tensile strength: 90% of tensile strength is retained after wetting twice in distilled water. In addition, the IPS lyocell fibers show good chemical stability to acids and alkalis, except for an extremely strong alkali—pH 14. Mercerization of the IPS lyocell fibers in the buffer solution of pH 14 notably decreases the tensile modulus but increases elongation.

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